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R. BOUTET.

PROCESS FOR DISHLLATIONOF GLYCERIN.

APPLICATION. FILED MAY 22 1918.

Pn'nred Oct. 14, 1919.

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UNITED STATES PATENT OFFICE. norma' nourrir, or PARIS, FRANcE, Assrsivon 'ro LA socrn'rn FRANCAISE DES eLYCEnINEs, or PARIS, FRANCE.-

PROCESS FOR DISTILLATION 0F G-LYGERIN.

To all lwhom it may concern Be it known that L ,Ronn'r BoUrn'r, citizen of the Republic of France, and resident of Paris, France, 28 Rue de Richelieu, have can be carried out under particularly f -avorable conditions.

According to the improved procedure, the glycerin is distilled by atomizing 1it by means of steam, nitrogen, air or other suitable gaseous fluid, in a chamber, heated to aboutl .180 C., distinguished from the methods heretofore employed in which the glycerin was merely distilled ina still. The known method has the drawback that as distillation proceeds the liquid becomes more `and more thick and more and more impure, the result being that some ofthe glycerin is lost, the distillate is less pure, and the yield of the apparatus less high. The present process completely .obviates all of these objectionable features.

An apparatus in which the improvedl proc- .ess may be carried out is illustrated in the accompanying drawing, but such apparatus forms no part of the present invention since it constitutes the subject matter'of my com'- panion application Serial No. 236,024, led concurrently with the present case.

In the drawing, Figure l is a side elevation and Fig. 2 a plan view of the apparatus, and Fig. 3 is a diagrammatic view, on an en lai-ged scale, of a portion of the atomizer.

Referring more particularly to the drawing, the a paratus therein represented 'comprises a s eet metal cylinder A containing glycerin, in the interior of'which there is arranged a concentric cylinder B in which the atomizing action takes place.

In the vessel A, the glycerin is heated by a suitable coil and raised to a temperaturev of about 180 C. The vessel is suppliedin a continuous manner by vacuum feed, and the level of the glycerin is maintained constant owing to the provision of a oat valve C.

The vessel A communicates with a water condenser through a pipe D, so that inipurities volatilized below 180O C. can escape-into Specification of Letters lvatent.

the condenser. r The vacuum is regulated to a given value by a valve E arranged in the pipe D.

The vessel A also has a vacuum gage L, a drain cock F and a pipe G terminating in a rose which conveys glycerin to the atomizer H. The vessel B, or atomizing chamber, has a drain valve I connected to a collecting drum for the residues which are produced as distillation proceeds an'd which must be discharged without stopping vthe action. This vessel B communicates at its top,

Patented Oct. 14.-, 1919.

Application med may 22, 1918. serial No. 236,023.

through a pipe S, with a series of condensers,

.and also carries a vacuum gage K.

The atomizers H, three of which areshown, are mounted on'the top of the vessel Aat the apices of an imaginary equilateral triangle inscribed within animaginary circle described from the center of said top with a radius equal to two-thirds of that of the atomizing chamber. The atomizers are vertically arranged, and their jets are directed downward.

F eed of glycerin to the atomizers is obtained and insured, on the one hand, by the pipe G with therose, and on the other hand by an inJection of steam through a pipe M and by Aa, regulation of the difference of vacuum between'the vessels A and B, which regulation is effected to suit the difference of level of the atomizers and of theglycerin,

and in accordance with the output to beobtained.

Inkoper-ation, the glycerin in the vessel A is heated by the coil therein, to a temperature of approximately 180 C.,'the level of the glycerin being maintained constant by means -of the float valve C. From the said vessel A,

the glycerin is supplied, by Way of pipe G,

to the several atomizers H which, in turn,

extend into theA central vessel or chamber B wherein the atomizing takes place. Both vesselsv A and B are under vacuum, but to differentv degrees, this difference in degree being yutilized to effect, in part, the passage of the glycerin from the outer or heating vessel A to the inner vessel B,`and being regulated according to vthe dilference of level between the atomizers andthe surface of the glycerin. The pipe M., by supplying steam to the atomizers, also serves to effect the feed ofthe. glycerin thereto, and in addition acts in the usual way to eect the actual atomizing operation. As distillation proceeds, the impurities, if any, which are volatilized below 180 C. in the vessel A, will escape therefrom through pipe D into the Water condenser, While the residues collecting in the Vessel B are dischargedthrough the drain valve I into the drum collector..

The distilled glycerin, on escaping from the atomizers, becomes condensed in a series of suitable condensers.

I claim as my invention: The herein-described process of distilling glycerin, which consists in heating it to a temperature of approximately 180 C., atomizing it while in such heated state by injecting a stream of gaseous fluid under pressure into it, separating the residues, and condensing the atomized glycerin.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ROBERT BOUTET.

Witnesses:

JOHN F. SIMoNs, GEORGES LoIsEL. 

